<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="node_modules/react/umd/react.development.js"></script>
    <script src="node_modules/react-dom//umd/react-dom.development.js"></script>
    <script src="node_modules/babel-standalone/babel.min.js"></script>
  </head>
  <body>
    <!-- 创建dom 根节点 -->

    <div id="demoReact"></div>

    <script type="text/babel">
     class Com extends React.Component {
         constructor(props){
             super(props)
             this.state = {
                 name:'喜喜'
             }
         }
         fun = ()=>{
             this.setState({
                 name:'haha'
             },()=>{
                 console.log(this.state.name)
             })
         }
     }
      
      ReactDOM.render(<Com />, document.getElementById("demoReact"));
    </script>
  </body>
</html>
